| House | Style | Title | Head of House | Partner | Heir |
| Castell-Rüdenhausen | Illustrious Highness | Prince of Castell-Rüdenhausen | Otto | Sophia | Prince Anton (Brother) |
| De Lippe | Serene Highness | Prince de Lippe | Stephan | Maria |
Bernhard, Hereditary Prince de Lippe (Eldest Son) |
| Fürstenberg | Serene Highness | Prince of Fürstenberg | Heinrich | Maximiliane |
Christian, Hereditary Prince of Fürstenberg (Eldest son) |
| Hanover | Royal Highness | Prince of Hanover | Ernst August | Caroline | Ernst August (Eldest Son) |
| Hohenzollern | Imperial and Royal Highness | Prince of Prussia | Georg Friedrich | Sophie | Carl Friedrich, Hereditary Prince of Prussia (Eldest Son) |
| Isenburg | Serene Highness | Prince of Isenburg | Alexander | Sarah | Franz Salvator, Hereditary Prince of Isenburg (Only Son) |
| Mecklenberg | Highness | Duke of Mecklenberg | Borwin | Alice | Duke Alexander (Eldest Son) |
| Sayn-Wittgenstein-Sayn | Serene Highness | Prince of Sayn-Wittgenstein-Sayn | Alexander | Gabriela | Heinrich, Hereditary Prince of Sayn-Wittgenstein-Sayn (Eldest Son) |
| Schleswig-Holstein-Sonderburg-Glücksburg | Highness | Prince of Schleswig-Holstein | Christoph | Elisabeth | Friedrich Ferdinand, Hereditary Prince of Schleswig-Holstein (Eldest Son) |
| Toerring-Jettenbach | Illustrious Highness | Graf zu Toerring-Jettenbach | Ingaz | Robina | Karl (Younger Brother) |
| Wittelsbach | Royal Highness | The Duke of Bavaria | Franz | N/A | Prince Max, Duke in Bavaria (Brother) |
| Württemberg | Royal Highness | The Duke of Württemberg | Carl | Diane | Duke Wilheim von Württemberg (Grandson) |
